| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 7.46 | 198908030_SFN_LAN |
| Mike Scott | HOU | 5.57 | 198908050_HOU_SFN |
| Bryn Smith | WAS | 5.3 | 198908040_WAS_NYN |
| John Smoltz | ATL | 4.63 | 198908030_SDN_ATL |
| Mike Moore | OAK | 4.6 | 198908050_OAK_SEA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -3.76 | 198908030_TEX_DET |
| Dave Schmidt | BAL | -2.85 | 198908040_TEX_BAL |
| Jerry Reuss | MIL | -1.99 | 198908040_ANA_MIL |
| Bruce Ruffin | PHI | -1.78 | 198908030_CHN_PHI |
| Rich Dotson | CHA | -1.67 | 198908030_CHA_OAK |
Based on accumulated WAA for this season up to 1989-08-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 5.38 | Bert Blyleven | 163.3 | ANA |
| +006+ | 5.12 | John Smoltz | 172.3 | ATL |
| +007+ | 5.07 | Orel Hershiser | 175 | LAN |
| +008+ | 4.83 | Chuck Finley | 159.3 | ANA |
| +009+ | 4.77 | Chris Bosio | 174 | MIL |
| +010+ | 4.76 | Mike Moore | 165.3 | OAK |
| +011+ | 4.74 | Mark Langston | 183.3 | TOT |
| +014+ | 4.54 | Rick Reuschel | 154 | SFN |
| +016+ | 4.46 | John Cerutti | 145.3 | TOR |
| +020+ | 4.31 | Bryn Smith | 150.7 | WAS |
| +021+ | 4.1 | Scott Garrelts | 134.3 | SFN |
| +023+ | 4.01 | Bret Saberhagen | 159.7 | KCA |
| +026+ | 3.83 | Greg Swindell | 153.3 | CLE |
| +027+ | 3.78 | John Smiley | 164.7 | PIT |
| +030+ | 3.64 | Mike Scott | 166.7 | HOU |
| +035+ | 3.53 | Ed Whitson | 162.3 | SDN |
| +040+ | 3.29 | Mike Morgan | 132 | LAN |
| +039+ | 3.29 | Mike Bielecki | 141.3 | CHN |
| +041+ | 3.26 | Greg Maddux | 153 | CHN |
| +044+ | 3.1 | Kevin Brown | 154.3 | TEX |
| +046+ | 3.03 | Sid Fernandez | 133.7 | NYN |
| +047+ | 3.02 | Dennis Martinez | 165 | WAS |
| +056+ | 2.7 | Kirk McCaskill | 137.3 | ANA |
| +058+ | 2.68 | Doug Drabek | 161.7 | PIT |
| +064+ | 2.63 | Bruce Hurst | 171.3 | SDN |
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